That is like asking what is the best kind of air to breath. Any oil is good. That being said, I have three JEEPS with the straight six and use nothing but synthetic for the past 30 years. No leaks no problems. This is a can of worms where everyone will say something different.Getting ready to change my oil, and heard these straight 6's don't like synthetic oil, causes them to leak. Don't want to mess anything up, so I thought I would ask, for a Texas Jeep, what is a good oil to put into a TJ with 112K on it?
No problems. Just make sure to drain as much as possible. Maybe walk away for an hour or so and let it drip in the catch pan. But it really won't make that much of a difference. Just buy a quality oil in the correct weight (10W30) and change it every 3k...:cheers2:Does it do any harm switching back to regular [new] oil, from, say unknown or possibly synthetic oil? I really have no idea what is in it right now, and want to switch to a known good oil of proper weight for Texas.